Side suction dust removal device of iron ore sintering system

Abstract

The utility model discloses a side suction dust removal device of an iron ore sintering system, which comprises a transverse pipe with two blocked ends, and a gas inlet pipe and a gas outlet pipe which are respectively arranged at the two ends of the transverse pipe, the transverse pipe comprises a pre-dust removal section and a re-dust removal section which are sequentially communicated along the flow direction of flue gas, and a plurality of upper baffles and lower baffles are alternately arranged in the pre-dust removal section along the flow direction of the flue gas. The upper baffle and the lower baffle are located on the upper portion and the lower portion of the pre-dedusting section respectively, a plurality of filter screens are arranged in the re-dedusting section in the smoke flowing direction, a dust collecting box is arranged below the re-dedusting section, a plurality of air cylinders are installed at the bottom of the dust collecting box, and piston rods of the air cylinders extend into the dust collecting box and then are connected with connecting rods. A blanking hole is formed in the bottom of the re-dedusting section below each filter screen, the upper end of a connecting rod penetrates through the blanking hole and then is connected with the corresponding filter screen, and rotary dedusting brushes are symmetrically arranged in the dust collection box on the two sides of the connecting rod. In conclusion, the utility model has the advantages that the filter screen is not easy to block, the dust cleaning effect is good, and long-term normal operation can be realized.

Description

Technical Field

[0001] This utility model relates to the field of dust removal technology for iron ore sintering flue gas, specifically to a side-suction dust removal device for an iron ore sintering system. Background Technology

[0002] During the processing of iron ore, sintering is carried out. In the sintering process, the sintering gas can be sprayed at the burner under the action of the combustion air. The flame is sprayed onto the surface of the sintering material to sinter it. However, the current sintering process generates a large amount of flue gas. The flue gas generated by sintering is emitted into the air, which will cause air pollution and affect the health of the surrounding workers.

[0003] Iron ore sintering typically employs belt-type exhaust sintering machines. This involves using a negative pressure fan to extract the flue gas from the sintering machine while simultaneously introducing air through the machine inlet. The extracted flue gas is then filtered by a dust collection device before being sent to subsequent processing equipment. However, these dust collection devices often suffer from the following problems: First, because the flue gas generated during sintering contains a significant amount of dust and particles, directly using bag filters is prone to clogging. Therefore, filters installed in the flue are used for primary filtration. However, the high-temperature dust in the flue gas easily adheres to the filter surface, leading to frequent clogging. Second, although some companies use brushes to clean the filters, this often only cleans one side of the filter, leaving the other side to accumulate more and more dust, resulting in incomplete cleaning and hindering continuous dust removal. Therefore, developing a side-suction dust collection device for iron ore sintering systems that is less prone to filter clogging, has excellent dust removal performance, and can operate normally for extended periods is objectively necessary. Utility Model Content

[0004] The purpose of this invention is to provide a side-suction dust removal device for an iron ore sintering system that is not prone to filter clogging, has a good dust removal effect, and can operate normally for a long time.

[0005] The purpose of this utility model is achieved as follows: it includes a horizontal pipe sealed at both ends and an air inlet pipe and an exhaust pipe respectively set at both ends of the horizontal pipe. The horizontal pipe includes a pre-dust removal section and a re-dust removal section connected in sequence along the flue gas flow direction. In the pre-dust removal section, several upper baffles and lower baffles are alternately arranged along the flue gas flow direction. The upper baffles and lower baffles are located at the upper and lower parts of the pre-dust removal section, respectively. In the re-dust removal section, multiple filter screens are arranged along the flue gas flow direction. A dust collection box is set below the re-dust removal section. Multiple cylinders are installed at the bottom of the dust collection box. The piston rod of the cylinder extends into the dust collection box and is connected to a connecting rod. A material drop hole is machined at the bottom of the re-dust removal section below each filter screen. The upper end of the connecting rod passes through the material drop hole and is connected to the corresponding filter screen. Rotary dust removal brushes are symmetrically arranged in the dust collection box on both sides of the connecting rod.

[0006] Furthermore, the pre-dust removal section and the re-dust removal section are connected by flanges.

[0007] Furthermore, there are multiple pairs of rotating dust removal brushes, arranged at intervals between each other.

[0008] Furthermore, a dust guide pipe is installed inside the dust collection box, and the upper end of the dust guide pipe is connected to the material drop hole below the air inlet side of the filter screen.

[0009] Furthermore, baffles are installed at the top of the re-dust removal sections on both sides of the filter screen.

[0010] Furthermore, the mesh diameter of multiple filters gradually decreases along the direction of flue gas flow.

[0011] Furthermore, the bottom of the pre-dust removal section includes two symmetrically arranged opening and closing plates. The inner sides of the two opening and closing plates are in contact with each other, and the outer sides are rotatably connected to the pre-dust removal section. A dust collection box is provided below the pre-dust removal section.

[0012] Furthermore, a high-temperature resistant sealing strip is provided on the inner side of the hinge panel.

[0013] When this utility model is in operation, the air inlet pipe is connected to the exhaust port of the sintering machine in the iron ore sintering system. The flue gas generated during the sintering process enters the horizontal pipe through the air inlet pipe. Under the obstruction of the upper and lower baffles, the flue gas flows up and down in the pre-dust removal section. On the one hand, the flue gas collides with the upper and lower baffles, and the dust and particles in it are separated from the flue gas during the collision process. On the other hand, during the up and down flow of the flue gas, the dust and particles in it are separated from the flue gas by gravity, thereby achieving the initial dust removal of the flue gas. It can quickly remove large dust and particulate impurities from the flue gas. Subsequently, the flue gas enters the re-dust removal section, where multiple filters are used to filter the flue gas again to remove smaller dust and particulate impurities. The combination of the two achieves a better dust removal effect. In this invention, by setting up a pre-dust removal section and a re-dust removal section, and employing an upper baffle, a lower baffle, and multiple filter screens, a combination of collision dust removal, gravity dust removal, and filtration dust removal methods is used, resulting in good dust removal efficiency and effect. Secondly, when a large amount of dust adheres to the filter screen, a cylinder can be activated. The cylinder, via a connecting rod, moves the filter screen up and down. During this up-and-down movement, the rotating dust removal brush is in a rotating state, simultaneously cleaning both sides of the filter screen. The cleaned dust falls into the dust collection box, resulting in more thorough dust removal. Compared to existing technologies that only clean one side of the filter screen, this method provides better cleaning and reduces filter clogging, facilitating continuous dust removal of flue gas and ensuring the long-term normal operation of the entire dust removal device. In summary, this invention has the advantages of filter screen that is less prone to clogging, good dust removal effect, and long-term normal operation. Attached Figure Description

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure of AA;

[0016] In the diagram: 1-Horizontal pipe, 2-Inlet pipe, 3-Exhaust pipe, 4-Pre-dust removal section, 5-Re-dust removal section, 6-Upper baffle, 7-Lower baffle, 8-Filter screen, 9-Dust collection box, 10-Cylinder, 11-Discharge hole, 12-Rotating dust removal brush, 13-Flange, 14-Dust guide pipe, 15-Baffle strip, 16-Opening and closing plate, 17-Dust collection box. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings, but this description is not intended to limit the present invention in any way. Any changes or improvements made based on the present invention shall fall within the protection scope of the present invention.

[0018] like Figures 1-2 As shown, this utility model includes a horizontal pipe 1 sealed at both ends and an inlet pipe 2 and an exhaust pipe 3 respectively disposed at both ends of the horizontal pipe 1. The flue gas discharged from the sintering machine enters the horizontal pipe 1 through the inlet pipe 2, and the filtered and dust-removed flue gas exits the horizontal pipe 1 through the exhaust pipe 3. The horizontal pipe 1 includes a pre-dust removal section 4 and a re-dust removal section 5 connected sequentially along the flue gas flow direction. Several upper baffles 6 and lower baffles 7 are alternately arranged in the pre-dust removal section 4 along the flue gas flow direction. The upper baffles 6 and lower baffles 7 are located at the upper and lower parts of the pre-dust removal section 4, respectively. Multiple filter screens 8 are arranged in the re-dust removal section 5 along the flue gas flow direction. A dust collection box 9 is arranged below the re-dust removal section 5. Multiple cylinders 10 are installed at the bottom of the dust collection box 9. The cylinders 10 are existing technology, and their stroke and other parameters are determined according to actual needs. The piston rod of the cylinder 10 extends into the dust collection box. A connecting rod is connected to the dust collection box 9. Each filter screen 8 has a discharge hole 11 at the bottom of the re-dust removal section 5. The discharge hole 11 has two functions: first, the filter screen 8 moves up and down in it; second, the dust filtered from the flue gas falls into the dust collection box 9 through the discharge hole 11. The upper end of the connecting rod passes through the discharge hole 11 and connects to the corresponding filter screen 8. Rotary dust removal brushes 12 are symmetrically arranged in the dust collection box 9 on both sides of the connecting rod. The rotary dust removal brushes 12 are existing technology and generally include a rotating roller and a brush set on the rotating roller. In use, a corresponding drive mechanism is installed to drive the rotating roller to rotate. When the rotating roller rotates, it drives the brush to rotate together. During the rotation, the brush cleans the filter screen 8 and brushes off the dust adhering to the filter screen 8 to ensure that the filter screen 8 has a sufficient effective filtration area.

[0019] When this utility model is in operation, the air inlet pipe 2 is connected to the exhaust port on one side of the sintering machine of the iron ore sintering system. The flue gas generated during the sintering process enters the horizontal pipe 1 through the air inlet pipe 2. Under the obstruction of the upper baffle 6 and the lower baffle 7, the flue gas flows up and down in the pre-dust removal section 4. On the one hand, the flue gas will collide with the upper baffle 6 and the lower baffle 7, and the dust and particles in it will be separated from the flue gas during the collision. On the other hand, during the up and down flow of the flue gas, the dust and particles in it will be separated from the flue gas by gravity, thereby achieving the initial dust removal of the flue gas. It can quickly remove large dust particles and particulate impurities in the flue gas. Then the flue gas enters the re-dust removal section 5, where multiple filters 8 are used to filter the flue gas again to remove smaller dust particles and particulate impurities. The combination of the two achieves a better dust removal effect. In this invention, by setting up a pre-dust removal section 4 and a re-dust removal section 5, and employing an upper baffle 6, a lower baffle 7, and multiple filter screens 8, a combination of multiple dust removal methods—collision dust removal, gravity dust removal, and filtration dust removal—is used, resulting in better dust removal efficiency and effect. Furthermore, when a large amount of dust adheres to the filter screen 8, the cylinder 10 can be activated. The cylinder 10 can drive the filter screen 8 up and down via a connecting rod. During the up-and-down movement of the filter screen 8, the rotating dust removal brush 12 is in a rotating state, simultaneously cleaning both sides of the filter screen 8. The cleaned dust falls into the dust collection box 9, resulting in a more thorough and cleaner cleaning. Compared to existing technologies that can only clean one side of the filter screen 8, this method provides a better cleaning effect, makes the filter screen 8 less prone to clogging, and facilitates continuous dust removal of flue gas, ensuring the long-term normal operation of the entire dust removal device.

[0020] To facilitate the assembly and disassembly of the pre-dust removal section 4 and the re-dust removal section 5, the pre-dust removal section 4 and the re-dust removal section 5 are connected by flange 13.

[0021] To improve the cleaning efficiency and effect of the filter screen 8, multiple pairs of rotating dust removal brushes 12 are used. These pairs of rotating dust removal brushes 12 are arranged vertically at intervals, and can sequentially clean the filter screen 8. The specific number of rotating dust removal brushes 12 can be determined according to parameters such as the size of the filter screen 8, as long as they can completely clean the dust adhering to the filter screen 8.

[0022] A dust guide pipe 14 is installed inside the dust collection box 9. The upper end of the dust guide pipe 14 is connected to the material discharge hole 11 below the air inlet side of the filter screen 8. When this device is in use, the filter screen 8 filters the dust in the flue gas. The filtered dust falls continuously, passes through the material discharge hole 11 and falls into the dust collection box 9. However, since this dust often falls onto the rotary dust collector brush 12, a large amount of dust adheres to the rotary dust collector brush 12, affecting the sweeping effect of the rotary dust collector brush 12 on the filter screen 8. Secondly, the dust that has just been separated from the flue gas is at a high temperature. If it falls directly onto the rotary dust collector brush 12, it may reduce the service life of the rotary dust collector brush 12. To avoid these problems, the dust guide pipe 14 is set up so that the dust separated from the flue gas can fall into the dust guide pipe 14 and then fall to the bottom of the dust collection box 9 through the dust guide pipe 14, and no longer fall onto the rotary dust collector brush 12.

[0023] The top of the dust removal section 5 on both sides of the filter screen 8 is provided with baffles 15. The two baffles 15 are located on both sides of the filter screen 8 and have a positioning function for the filter screen 8. When the filter screen 8 rises to the position, the two baffles 15 fix it in the middle to prevent the filter screen 8 from shaking, tilting, deforming or other problems during use.

[0024] The mesh diameter of multiple filters 8 gradually decreases along the direction of flue gas flow. Multiple filters 8 filter dust in the flue gas in sequence. As the mesh size of multiple filters 8 gradually decreases, larger dust particles are filtered out first, then smaller dust particles are filtered out, and so on, filtering the flue gas step by step to improve the filtration efficiency and effect of dust in the flue gas.

[0025] The pre-dust removal section 4 is used to initially remove dust and other impurities from the flue gas. The dust and other impurities separated from the flue gas continuously accumulate at the bottom of the pre-dust removal section 4. To ensure the normal operation of the device, the accumulated dust needs to be discharged in a timely manner. To facilitate dust discharge, the bottom of the pre-dust removal section 4 includes two symmetrically arranged hinged plates 16. The inner sides of the two hinged plates 16 contact each other, and their outer sides are rotatably connected to the pre-dust removal section 4. A dust collection box 17 is provided below the pre-dust removal section 4. During operation, a corresponding drive device can be installed to drive it. The opening and closing state of the movable hinged plate 16 is controlled by a drive device, which is existing technology and only needs to be able to drive the hinged plate 16 to open and close. When the dust in the pre-dust removal section 4 accumulates to a certain extent, the two hinged plates 16 can be driven to rotate downwards. At this time, on the one hand, the distance between the inner sides of the two hinged plates 16 gradually increases, which is conducive to the dust falling; on the other hand, the hinged plates 16 are in an inclined state, which is also conducive to the dust being discharged. The discharged dust falls into the dust collection box 17 for storage. After the dust is discharged, the hinged plates 16 are driven to rotate upwards again by the drive device until they are closed. In operation, other dust discharge mechanisms can also be used, as long as they are easy to operate and easy to discharge dust.

Claims

1. A side-suction dust removal device for an iron ore sintering system, comprising a horizontal pipe (1) sealed at both ends and an air inlet pipe (2) and an exhaust pipe (3) respectively disposed at both ends of the horizontal pipe (1), characterized in that... The horizontal pipe (1) includes a pre-dust removal section (4) and a re-dust removal section (5) connected in sequence along the flue gas flow direction. Several upper baffles (6) and lower baffles (7) are alternately arranged in the pre-dust removal section (4) along the flue gas flow direction. The upper baffles (6) and lower baffles (7) are located at the upper and lower parts of the pre-dust removal section (4), respectively. Multiple filter screens (8) are arranged in the re-dust removal section (5) along the flue gas flow direction. A dust collection box (9) is arranged below the re-dust removal section (5). Multiple cylinders (10) are installed at the bottom of the dust collection box (9). The piston rod of the cylinder (10) extends into the dust collection box (9) and is connected to a connecting rod. A material drop hole (11) is machined at the bottom of the re-dust removal section (5) below each filter screen (8). The upper end of the connecting rod passes through the material drop hole (11) and is connected to the corresponding filter screen (8). Rotary dust removal brushes (12) are symmetrically arranged in the dust collection box (9) on both sides of the connecting rod.

2. The side-suction dust removal device for an iron ore sintering system according to claim 1, characterized in that... The pre-dust removal section (4) and the re-dust removal section (5) are connected by a flange (13).

3. The side-suction dust removal device for an iron ore sintering system according to claim 1, characterized in that... The number of the rotating dust removal brushes (12) is multiple pairs, and the multiple pairs of rotating dust removal brushes (12) are arranged vertically at intervals.

4. The side-suction dust removal device for an iron ore sintering system according to claim 1, characterized in that... The dust collection box (9) is equipped with a dust guide pipe (14), and the upper end of the dust guide pipe (14) is connected to the material drop hole (11) below the air inlet side of the filter screen (8).

5. A side-suction dust removal device for an iron ore sintering system according to claim 1, characterized in that... The top of the dust removal section (5) on both sides of the filter (8) is provided with baffles (15).

6. A side-suction dust removal device for an iron ore sintering system according to claim 1, characterized in that... The mesh diameter of multiple filters (8) gradually decreases along the direction of flue gas flow.

7. A side-suction dust removal device for an iron ore sintering system according to claim 1, characterized in that... The bottom of the pre-dust removal section (4) includes two symmetrically arranged opening and closing plates (16). The inner sides of the two opening and closing plates (16) are in contact with each other, and the outer sides are rotatably connected to the pre-dust removal section (4). A dust collection box (17) is provided below the pre-dust removal section (4).

Images